Physics: How does placing a ferromagnetic core into the centre of a solenoid affect the strength of the electromagnet?

Placing a ferromagnetic core into the centre of the solenoid increases the strength of the electromagnet. This is because ferromagnetic materials consist of so-called domains, which can be seen as little areas inside the material with magnetic properties. Once placed in an electromagnet, these domains line up in the direction of the electromagnet's magnetic field. Before being placed into the electromagnet, the domains pointed in random directions which resulted in any mangnetic effects cancelling each other out. The domains pointing in the same direction now creates a net magnetic field in the core which adds to the magnetic field of the electromagnet.

© by Simon Rösel, 2015. This piece of writing was written as an assignment for my Physics 12 Class (Nova Scotia, Canada). Mark: 100%